#include <stdio.h>
#define  NYEARS   5
#define  NMONTHS  12

int lookup(int year, int month)
{
   int table[NYEARS][NMONTHS] =
      {
         {30,40,75,95,130,220,210,185,135,80,40,45},
         {25,25,80,75,115,270,200,165, 85, 5,10, 0},
         {35,45,90,80,100,205,135,140,170,75,60,95},
         {30,40,70,70, 90,180,180,210,145,35,85,80},
         {30,35,30,90,150,230,305,295, 60,95,80,30}
      };
      
   if ((0 <= year) && (year < NYEARS) &&
       (0 <= month) && (month < NMONTHS))
   {
      return table[year][month];
   }
   else
   {
      return -1;
   }
}

int main()
{
   int   year;
   int   month;
   int   rainfall;
   
   printf("Enter year and month: ");
   scanf("%d %d", &year, &month);
   
   rainfall = lookup(year - 1, month - 1);
   
   if (rainfall < 0)
   {
      printf("Year must be between 1 and %d,\n", NYEARS);
      printf("and month must be between 1 and %d.\n", NMONTHS);
   }
   else
   {
      printf("Rainfall for year %d, month %d is %d mm.\n",
         year, month, rainfall);
   }

   return 0;
}